/**
 * Child MCP Registry
 *
 * In-memory registry tracking spawned child MCP processes,
 * their client connections, discovered tools, and lifecycle status.
 * Session-scoped — cleaned up when the MCP server exits.
 */
import type { ChildProcess } from "node:child_process";
import type { Client } from "@modelcontextprotocol/sdk/client/index.js";
import type { McpConfig } from "../client/types.js";
export interface ChildMcpTool {
    /** Tool name as discovered from the child MCP */
    name: string;
    /** Tool description */
    description: string;
    /** JSON Schema for the tool's input */
    inputSchema: Record<string, unknown>;
}
export interface ChildMcpEntry {
    /** The spawned child process */
    process?: ChildProcess;
    /** MCP SDK client connected to the child */
    client: Client;
    /** Tools discovered via client.listTools() */
    tools: ChildMcpTool[];
    /** The config used to spawn this child */
    config: McpConfig;
    /** Where this child came from */
    source: `skill:${string}` | "standalone";
    /** The memory_id from the backend (if applicable) */
    memory_id: string;
    /** Current process status */
    status: "active" | "crashed";
    /** When the child was spawned */
    spawned_at: Date;
}
export declare class ChildMcpRegistry {
    private readonly children;
    /**
     * Register a new child MCP entry.
     * @throws if standalone or total limits are exceeded.
     */
    add(name: string, entry: ChildMcpEntry): void;
    /** Get a child MCP entry by name. */
    get(name: string): ChildMcpEntry | undefined;
    /** Remove a child MCP by name. Returns true if it existed. */
    remove(name: string): boolean;
    /** List all child MCP entries. */
    list(): ChildMcpEntry[];
    /** List all child MCP entries with their registry names. */
    entries(): Array<[string, ChildMcpEntry]>;
    /** Check if a child MCP is registered. */
    has(name: string): boolean;
    /** Current number of child MCPs. */
    count(): number;
    /** List child MCPs filtered by source. */
    listBySource(source: "standalone" | string): ChildMcpEntry[];
    /** Count child MCPs by source type. */
    countBySource(sourceType: "standalone" | "skill"): number;
    /** Get all entries whose source matches a specific skill name. */
    listBySkill(skillName: string): ChildMcpEntry[];
    /** Get all registered child MCP names. */
    names(): string[];
}
/** Singleton child MCP registry instance */
export declare const childMcpRegistry: ChildMcpRegistry;
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